CN104115249B - Electrical contact equipment, chopper and electrical contact assembly and operational approach including cam lever - Google Patents
Electrical contact equipment, chopper and electrical contact assembly and operational approach including cam lever Download PDFInfo
- Publication number
- CN104115249B CN104115249B CN201280069109.XA CN201280069109A CN104115249B CN 104115249 B CN104115249 B CN 104115249B CN 201280069109 A CN201280069109 A CN 201280069109A CN 104115249 B CN104115249 B CN 104115249B
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- Prior art keywords
- bearing part
- cam
- contact
- electrical contact
- pivot
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
- H01H33/18—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
- H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
- H01H1/22—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact
- H01H1/221—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member
- H01H1/226—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member having a plurality of parallel contact bars
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
- H01H1/502—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position the action of the contact pressure spring becoming active only after engagement of the contacts
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H77/00—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting
- H01H77/02—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism
- H01H77/10—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening
- H01H77/102—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening characterised by special mounting of contact arm, allowing blow-off movement
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
Disclose the contact arrangement (101) of a kind of chopper.This contact arrangement has outer bearing part (220), interior bearing part (222), is pivotally mounted to one or more contact fingers (226) of interior bearing part (222), is pivotally mounted to the cam lever (228) of outer bearing part (220) and is formed at the cam (230) on corresponding cam lever (228) and interior bearing part (222) and cam contour (232).Disclose chopper and electrical contact assembly, operation contact arrangement (101) and the method for electrical contact assembly with contact arrangement (101).
Description
Technical field
Present invention relates in general to chopper, more particularly, it relates to the electricity being suitably employed in chopper
Contact mechanism.
Background technology
Some low-voltage circuit breakers can include the electrical contact assembly often mutually with one or more contact finger, its
In, contact finger is for separating because of magnetic repulsion under the highest short-circuit conditions.Generally, one or many
Moveable contact finger is biased into closed structure by individual spring so that static and removable electrical contact it
Between provide be in close contact.Some choppers can include the multiple contact assemblies arranged with side-by-side configuration.Example
As, single electricity can directed be coupled to individually make electrical contact with assembly side by side mutually.Three-phase or four phase open circuits
Device assembly is common.In order to produce sufficient contact force in some chopper, need to be attached to
The contact spring of contact finger prepares the biggest.Certainly, this requires large space covering (envelope), and this is
That be difficult to obtain or cause design compromise.
Accordingly, it would be desirable to the electrical contact equipment of a kind of improvement being suitably employed in this electrical contact assembly.
Summary of the invention
In the first embodiment, it is provided that a kind of electrical contact equipment.This electrical contact equipment includes outer carrying
Part, relative to outer bearing part around interior bearing part pivot movably in bearing part, be pivotally mounted in
One or more contact fingers of bearing part, it is pivotally mounted to the cam lever of outer bearing part and is formed at
Cam on corresponding cam lever and interior bearing part and cam contour, cam is suitable to follow cam contour.
In another apparatus embodiments, it is provided that a kind of contact arrangement.This contact arrangement includes: hold outward
Holder, has the first lower limb and the second lower limb separated with the first lower limb, outer bearing part pivot, cam lever pivot
With cam spring installed part；Interior bearing part, have the first side and the second side separated with the first side,
Between first side and the second side extend contact spring support member and be installed in the first side and the second side
The cam of every side, interior bearing part is suitable to pivot relative to outer bearing part around interior bearing part pivot, its
In, interior bearing part pivot and outer bearing part pivot are coaxial；One or more contact fingers, pivotally
It is installed between first side and the second side of interior bearing part the finger pivot pin extended；Contact spring, phase
Each contact finger is biased for contact spring support member；Cam lever, has the first bar side and the second bar
Side, and cam contour, cam contour is positioned on every side of the first cam side and the second cam side,
Being suitable to be engaged by cam, cam lever is adapted to outer bearing part and pivots on cam lever pivot；And
Cam spring, is connected between cam lever and cam spring installed part.
In another embodiment, it is provided that a kind of electrical contact assembly.This electrical contact assembly includes that contact sets
Standby, contact arrangement has outer bearing part；Interior bearing part, has and is adapted to what interior bearing part rotated
One or more contact fingers, each inclined by spring relative to interior bearing part in one or more contact fingers
Pressure, interior bearing part can pivot relative to outer bearing part；Cam lever, it is possible to relative to outer bearing part pivot
Turn；Cam and cam contour, lay respectively on corresponding cam lever and interior bearing part, and cam contour is fitted
In engaging with described cam；And operating mechanism, it is attached to outer bearing part, and is suitable to disconnect and/or close
Close contact arrangement.
In another embodiment, it is provided that a kind of chopper.This chopper includes Shell of circuit breaker；With
And the electrical contact assembly being arranged in Shell of circuit breaker, electrical contact assembly includes that contact arrangement, contact set
Get everything ready outer bearing part；Interior bearing part, has and is adapted to the one or more of interior bearing part rotation
Contact finger, each spring biased relative to interior bearing part in one or more contact fingers, interior carrying
Part can pivot relative to outer bearing part；Cam lever, it is possible to pivot relative to outer bearing part；Cam and
Cam contour, lays respectively on corresponding cam lever and interior bearing part, and cam contour is suitable to convex with described
Wheel engages；And operating mechanism, it is attached to outer bearing part, and is suitable to disconnect and/or Guan Bi contact sets
Standby.
In embodiment of the method, it is provided that a kind of method operating electrical contact equipment.The method includes carrying
For a kind of contact arrangement, this contact arrangement has outer bearing part；Interior bearing part, it is possible to relative to holding outward
Holder pivots；Pivotable one or more contact fingers, one or more contact fingers on interior bearing part
Spring biased both with respect to interior bearing part；Cam lever, it is possible to pivot relative to outer bearing part；And
Cam and cam contour, be positioned on corresponding cam lever and bearing part, and cam contour is suitable to described
Cam engages；And make cam lever pivot relative to outer bearing part.
(the optimal side implementing the present invention is included by the many exemplary embodiments of explanation and embodiment
Formula), from be described below in detail, it is readily apparent from other aspects, features and advantages of the present invention.The present invention
Can also have other and different embodiment, its some details can be modified in many aspects.Phase
Ying Di, drawing and description are not considered as illustrative and restrictive in itself.The present invention anticipates
Containing all modifications example, equivalent and the alternative fallen within the scope of the present invention.
Accompanying drawing explanation
Fig. 1 illustrates the side view of the chopper including the electrical contact assembly according to embodiment.
Fig. 2 A illustrates the isometric view of the electrical contact equipment according to embodiment.
Fig. 2 B illustrates the partial cross sectional side view of the electrical contact equipment according to embodiment, in order to clear
For the sake of, remove the first half of outer bearing part, interior bearing part and cam lever.
Fig. 2 C illustrates the side view of the outer bearing part according to embodiment.
Fig. 2 D illustrates the side view of the interior bearing part according to embodiment.
Fig. 2 E illustrates the side view of the contact finger of the electric conductor with connection according to embodiment.
Fig. 2 F illustrates the side view of the cam lever according to embodiment.
Fig. 2 G illustrates the isometric view of the outer bearing part according to embodiment.
Fig. 2 H illustrates the isometric view of the contact arrangement mounting bracket according to embodiment.
Fig. 2 I illustrates the isometric view of the interior bearing part according to embodiment.
Fig. 2 J illustrates the partial cross sectional side view of the cam according to embodiment.
Fig. 2 K illustrates the isometric view of the cam lever according to embodiment.
Fig. 2 L illustrates the isometric view of the contact arrangement being in OFF structure according to embodiment.
Fig. 3 illustrates the electrical contact equipment according to embodiment and the side view of some of parts, for understanding
See, remove outer bearing part, cam lever and interior bearing part side.
Fig. 4 illustrates the side view of the electrical contact equipment according to embodiment, for clarity sake, outside removing
Bearing part side.
Fig. 5 illustrates the isometric view of the heterogeneous electrical contact assembly according to embodiment.
Fig. 6 illustrates the isometric view of the heterogeneous electrical contact equipment according to embodiment.
Fig. 7 and 8 illustrates equidistantly regarding of the electrical contact equipment including slot type motor according to embodiment
Figure.
Fig. 9 illustrates and blows the equidistant of electrical contact equipment that (blown open) construct according to being in of embodiment
View.
Figure 10 illustrates the side view of the electrical contact equipment being in ON structure according to embodiment.
Figure 11 illustrates the side-looking of the electrical contact equipment components being shown constructed in ON according to embodiment
Figure, for clarity sake, removes outer bearing part side.
Figure 12 illustrates the side-looking to blow the electrical contact equipment components being shown constructed according to embodiment
Figure.
Figure 13 is the flow chart illustrating the method operating the electrical contact assembly according to embodiment.
Detailed description of the invention
The embodiment of electrical contact equipment and electrical contact assembly is used in chopper, such as low-voltage circuit breaker.
The embodiment of electrical contact equipment is particularly suitable to be used in the chopper comprising contact assembly, described contact group
Part has multiple contact finger, and described contact finger is for separating under the highest short-circuit state.Desired
It is that this chopper has the electrical contact remained closed to dead-beat in some cases.These situations
Can include that height bears electric current, such as be up to about the electric current of breaker rated current 23 times.In order to reach this
High ability to bear, it is possible to provide the highest spring force is so that galvanic electricity contact and electrostatic contact separate.So
And, for assembling the big structure member of bigger spring and these big springs of support, chopper
Interior space is the most extremely limited.Existing design attempts to be solved by the bigger spring of interpolation and parts
This problem.But, in the designs, or to bear grade as cost, or must distribute big
Quantity space gives more big spring so that chopper is the biggest.
In view of aforementioned difficulties, it is provided that the electrical contact equipment of improvement and electrical contact assembly.According to one or
Multiple embodiments, it is provided that a kind of electrical contact equipment, it includes outer bearing part；Interior bearing part, it is possible to
Move relative to outer bearing part；One or more contact fingers, are pivotally mounted to interior bearing part；Cam
Bar, is pivotally mounted to outer bearing part, and includes cam.Cam and cam contour may be formed at accordingly
Cam lever and interior bearing part on.In operation, cam is suitable to follow cam contour.Describe and include
The electrical contact assembly of contact arrangement, operation contact arrangement and the method for assembly.Will become obvious, tool
The electrical contact equipment having cam lever advantageously provides leverage (such as mechanical gain), thus reduces spring
Power requirement, therefore allows to use less contact spring.
Describe electrical contact equipment below with reference to Fig. 1-13, make electrical contact with assembly, include electrical contact equipment and electricity
These and other of the method for the chopper of contact assembly and operation electrical contact equipment and electrical contact assembly
Embodiment.Accompanying drawing is not necessarily drawn to scale.In the text, identical label is used for representing identical unit
Part.
Specifically now referring particularly to Fig. 1, it is shown that chopper 100.Chopper 100 can be one pole or many
Pole chopper, has the multiple electrical contact equipment 101 being assemblied in Shell of circuit breaker 102.Such as, disconnected
Road device 100 can include the multiple independent electrical contact equipment 101 corresponding to three or more electricity phases, for
Each electricity provides chopper 100 mutually.Optionally provide four phases or even five phase choppers, as described herein
Single electrical contact equipment 101 specify for each phase.Such as, each electrical contact equipment 101 is permissible
It is orientated (see Fig. 5 and 6) with side-by-side configuration in housing 102.
The electricity that contact arrangement 101 can be included in the Shell of circuit breaker 102 being assemblied in chopper 100 connects
Touch in assembly 104.Electrical contact assembly 104 can include operating mechanism 106, and operating mechanism 106 is by connection
Moving part 107 etc. is mechanically coupled to contact arrangement 101, so that contact arrangement 101 disconnected in some moment
To OFF construct, such as in response to any trip event or make chopper 100 transfer to OFF structure.Behaviour
Make mechanism can manually or electrically control, i.e. in response to electric control signal.Single operation mechanism 106
The electrical contact equipment 101 of one or more than one can be attached to, such as shown in Fig. 1,2L and 5-6.Behaviour
Making mechanism 106 can be accumulation energy type mechanism, or the toggle mechanism of handle operation.At stored energy mechanism
In the case of, main spring via ratchet handle or optional motor by load.Main spring can be deposited
Store up enough energy for 2 opening and closing operations, i.e. Guan Bi-open-close-open, and need not be to bullet
Spring carries out any middle application of load.Disconnect and Guan Bi starts, in fault via button or remote controllers
During situation, operating mechanism can pass through a device (such as electronic trip unit) and automatically trip.Handle operates
Toggle mechanism be the selection of low cost, it makes use of the spring-toggle mechanism of bias.With initial release
Spring system start, handle is pushed into OFF/RESET position, with to spring application of load, and breech lock
This mechanism.Then, handle is pushed into ON position, to close contact.From ON position, can be by hands
Handle is pushed into OFF with breaking-off contact, or when fault state, and sensing device is the warmmest/magnetic trip unit
Or electronic trip unit can by rotating lock bar actuation trip.The existing example of stored energy mechanism includes
The air-break of Siemens 3WL strain.The existing example of the toggle mechanism of handle operation includes
The pattern chopper of Siemens Sentron and 3VL strain.Electrical contact equipment 101 can be electrically coupled to electricity
Terminal, such as loaded termination 108 and line terminal 110.Any suitable terminal type can be provided, than
Such as plug-in termination.
Electrical contact equipment 101 can be electrically coupled to be suitable to be connected respectively to loaded termination 108 and line terminal
The load conductor 112 of 110 and wire 114.Contact arrangement 101 can pass through load conductor 112 and wire
114 are electrically coupled to loaded termination 108 and line terminal 110 respectively.Load conductor 112 and wire 114
Can be made up of any suitable conducting material, such as copper or copper alloy.Load conductor 112 He can be used
Any suitable constructions of wire 114.Such as, wire 112 can include curved configuration (bent over
Configuration), static electrical contact 114S is attached to wire 114.Load conductor 112 may be coupled to
Fexible conductor, fexible conductor is attached to again one or more contact finger.Arc assembly 116 can be neighbouring
The electrical contact device of contact arrangement 101, to help arc extinguishing.Alternatively, slot type motor 118 can be adjacent
Nearly contact is arranged.Slot type motor 118 can have any suitable construction.
Specifically now referring in detail to Fig. 2 A to Fig. 2 I, it is shown specifically electrical contact equipment 101 and each
The embodiment of parts.Electrical contact equipment 101 is referred to herein as " electrical contact equipment " or " contact sets
Standby ".Electrical contact equipment 101 can be assemblied in Shell of circuit breaker 102 with any proper orientation.As institute
Showing, electrical contact equipment 101 includes outer bearing part 220, can hold around interior relative to inside and outside bearing part 220
Interior bearing part 222 that holder pivot 224 moves, it is pivotally mounted to of interior bearing part 222 or many
Individual contact finger 226 and cam lever 228.Cam lever 228 is pivotally mounted to outer bearing part 220.
Cam 230 and cam contour 232 are formed on corresponding cam lever 228 and interior bearing part 222.?
During operation, cam 230 is suitable to follow cam contour 232, as described further below.Cam bullet
Spring 234 can arrange and may be coupled to cam lever 228, to provide spring-biased to cam lever 228.Cam
Spring 234 can be attached to outer bearing part 220 at cam spring support member 240.Other spring can be used
Installation site and structure.Fig. 2 A illustrates and blows structure rather than reset structure.Outside resetting by promoting
Bearing part 220 completes.
In more detail, each parts of electrical contact equipment 101 are presently described.Such as Fig. 2 A, 2C and 2G
Being best illustrated in, outer bearing part 220 can include the first lower limb 220A and spaced apart with the first lower limb 220A
Two lower limb 220B, outer bearing part pivot 236, cam lever pivot 238 and cam spring support member
240.Outer bearing part pivot 236 can be attached to Shell of circuit breaker 102 by support 245 (Fig. 2 H) etc..
Any suitable installation constitution can be used.Outer bearing part pivot 236 can be formed by any suitable method.
Such as, outer bearing part 236 can be formed as multidiameter in the end of interior bearing part pivot 224, and it can be from
Outer bearing part lower limb 220A, 220B extend, and at the bracket holes 245A being formed on support 245 arm
Middle pivot, support receives the both sides of bearing part 220 outside.Cam lever pivot 238 and outer bearing part pivot
Axle 236 is spaced apart.
Outer bearing part 220 can include attachment features 242, and it can be used for being attached STATEMENT OF FEDERALLY SPONSORED 107 so that electricity
Contact can disconnect (such as, when tripping operation or actuating construct to OFF) when operating mechanism 106 action.
Attachment features 242 can include stop rivet, screw or other securing member, to allow STATEMENT OF FEDERALLY SPONSORED 107
Pivotal attachment.STATEMENT OF FEDERALLY SPONSORED 107 should be idioelectric or insulation.Outer bearing part 220 can wrap
Include one or more cross-brace 244, be used for providing the rigidity of structure.Support the 245, first lower limb
220A, the second lower limb 220B, interior bearing part pivot 224, outer bearing part pivot 236 and cross-brace
244 can be made up of suitable rigid material, such as steel, rustless steel or pyrite.
Interior bearing part 222 can include the first side 222A and the second side 222B and be attached to first and
The contact spring support member 248 of the one or both sides in two side 222A, 222B.In illustrated embodiment
In, contact spring support member 248 extends between side 222A, 222B.First side 222A, second
Side 222B and contact spring support member 248 may be made in integral piece or be soldered to described side 222A,
222B.Interior bearing part 222 can include that contact finger excess of stroke retainer 250 and contact finger blow retainer
252, contact finger blow retainer for by the movement limit of one or more contact fingers 226 in boundary
In.It can be in described side that contact finger excess of stroke retainer 250 and contact finger blow retainer 252
The rod extended between 222A, 222B.The finger pivot pin that can extend between described side 222A, 222B
254 are suitable to receive one or more contact finger 226 pivotally.Refer to that pivot pin 254 can include being positioned at two ends
Guide (pilot) 254A, 254B (Fig. 2 I), they are solderable in the hole of described side, or such as
Fastened by riveting guide 254A, 254B.Contact finger excess of stroke retainer 250 can be the tightest
Gu.First side 222A, 222B, contact spring support member 248, contact finger excess of stroke retainer 250,
Contact finger blows retainer 252 and refers to that pivot pin 254 can be made up of suitable rigid material, such as
Steel, rustless steel or pyrite.
Interior bearing part pivot 224 is formed as ladder pin, wherein, is positioned at the end guide at two ends
224A, 224B via 222A, 222B reception of interior bearing part side, and can extend beyond described side, with
Form the guiding in the receiver hole receiving outer bearing part lower limb 220A, 220B of bearing part 220 outside
Part, and then form outer bearing part pivot 236.In the embodiment shown, interior bearing part pivot 224 is with outer
Bearing part pivot 236 is shown as overlapping, and colocated, i.e. interior bearing part pivot and outer bearing part
Pivot includes the pivotal line shared.In this embodiment, support 245 may be connected to interior bearing part pivot
224 extend through in interior bearing part side 222A, 222B and outer bearing part lower limb 220A, 220B every
Extension guide 224A, 224B of one.Extend guide 224A, 224B end can rivet or
Threaded to receive securing member, and outer bearing part 220 is pivotally secured to support 245.Optional
Ground, interior bearing part pivot 224 and outer bearing part pivot 236 can be offset from one another.Interior bearing part 222 can
Including optional extension 222C, it may be adapted to install extra back-moving spring (see Figure 12).
In the embodiment shown, cam 230 is arranged on the one or both sides of interior bearing part 222.Cam
Profile 232 may be provided at the one or both sides of cam lever 228.In order to prevent retraining (binding), cam
230 should be arranged on both sides.Cam 230 can be formed by any suitable construction.Such as Fig. 2 J institute
Showing, cam 230 is roller cam, and it includes outer roller 230A, and outer roller can be around Roller Shaft 230B
Rotate freely through, as shown in cross section.Cam bawl 230A rides against be positioned on cam lever 228
On the individual or multiple cam contour 232 being suitably formed.Such as, cam roller shaft 230B can be at contact finger
Step is formed as on excess of stroke retainer 252.Alternatively, cam 230 may be formed at interior bearing part 222
On Anywhere.Cam 230 and cam contour 232 may be formed at provides appointing of abundant leverage
What position.In another constructs, cam 230 may be formed on cam lever 228, cam contour 232
May be formed on the surface of interior bearing part 222.Therefore, cam 230 and cam contour 232 can be formed
On corresponding cam lever 228 and interior bearing part 222, wherein, cam 230 is suitable to follow cam wheel
Wide 232.
As best illustrated in Fig. 2 K, cam lever 222 can include neighbouring interior bearing part 222 first side
The first side 228A and the second side 228B of neighbouring interior bearing part 222 second side 222B of 222A.Institute
State side 228A, 228B to be attached by cam lever pivot bar 255, cam lever pivot bar 255
There is guide 255A, the 255B that can extend across described side 228A, 228B.Guide
255A, 255B receive in the hole 256 of bearing part 220 outside pivotly, to form cam pivot
238.Other type of pivot formation mechanism can be used.Cam lever 228 can include lever arm 258, and can
Including spring mount 260, spring mount extends between described side 228A, 228B, and couples
Described side 228A, 228B.Spring mount 260 can be ladder pin, and this ladder pin includes receiving also
It is fastened on the guide in side 228A, 228B, as discussed previously.Cam contour 232 may be included in
On the sidewall of cut out portion 262, cut out portion can be formed in the side in side 228A, 228B
Or the groove on both sides or raceway groove.Such as, cam contour 232 can include curved surfaces.Can be used other
Radius of the radian.Cam lever 228 is configured and adapted to pivot around cam pivot 238, and cam 230 rides against
On cam contour 232, cam spring 234 may be installed the contact being positioned on outer bearing part 220 simultaneously
Between spring support 240 and the spring mount on cam lever 228 260.Enter one in the text
Step describes the desired relative size of cam 228.Cam lever 222 can be made up of suitable rigid material,
Such as steel, rustless steel or pyrite.
Referring now to Fig. 2 E, one or more contact fingers 226 can be by one or more flexible conductance
Body 264 is electrically coupled to corresponding loaded termination 108 (such as, single-phase).In certain embodiments, flexibility is led
Body 264 can be one or more braiding or the conductive metal wire of lamination, such as copper braided wire.
At least one fexible conductor 264 can be such as connected to by braiding, melting welding, soldering, mechanical fasteners etc.
Each contact finger 226.Other connected mode can be used, such as fexible conductor 264 is fixed to adapter
Element 264A, 264B, connecting element is connected to corresponding contact further through any of the above-described method of attachment and refers to
226 and loaded termination 108.Each electrical contact equipment 101 can include one or more contact finger 226.
One or more contact fingers 226 can include hole 226A, and it receives on contact finger pivot pin 254, makes
Obtain each contact finger 226 can the most automatically pivot.Galvanic electricity contact 226M may be formed at each connecing
The end of fingertip 226, and in closed structure, (Fig. 1) can be electrically connected with static contact 114S.Each connect
Fingertip 226 can include that spring mounting protrusion 226S, spring mounting protrusion 226S are configured and adapted to connect
Touch spring 265 and be arranged on (Fig. 2 B) between each contact finger 226 and contact spring support member 248.
In the embodiment shown, each contact spring 265 can be helical coil springs.Such as, spring
265 be sized to provide on main contact 226M effective spring force FS.Other water can be used
Flat spring force.Contact spring 265 can have any appropriate length and shape.Cam spring 234 can
To be single helical coil springs, or multiple parallel springs.As can be seen from Fig. 3, it will therefore be apparent that if
Have N number of finger being respectively provided with contact force FS, then the resultant couple around shared pivot 224 is
[N*FS*(D1+D2)].This moment is resisted by equal moment of resistance in opposite direction, this moment of resistance
Thered is provided by cam spring 234.Moment of resistance is (F1 × D7), and wherein, F1 is supplied by cam spring power
Give, and equal to (F2*D6/D5).Therefore, cam spring 234 must feed more than or be equal to
Power F2 of [N*FS*D5* (D1+D3)/(D6*D7)].By supplying this power from cam spring, can be true
Guarantor's electrical contact remains closed, and cam spring 234 can resist contact spring 265.
In certain embodiments, cam lever 228 and cam spring 234 is used can to improve chopper 100
Bear grade (in the case of being not turned off electrical contact, the maximum short circuit current that chopper can bear).
Ratio D5/D6 represents favourable mechanical gain, because it has doubled, cam spring 234 can supply effectively
The resultant couple of one or more contact finger 226 should be arrived.In feasible region, dimension D 7 should be as far as possible
Greatly, so that maximum from the effective torque of cam spring 234 conveying.Therefore, with not there is mechanical gain
Other theory compare, bigger holding torque can be supplied to one or more contact fingers 226.Example
As, the contact force between static contact 114S and moving contact 226M should be positioned at about 30N and 50N it
Between.Other contact force can be used.
Fig. 2 L explanation is to disconnect the contact arrangement 101 shown in structure, and cam 230 resets back to cam contour
Lower position on 232, outer bearing part 220 promotes via the STATEMENT OF FEDERALLY SPONSORED 107 that is rotated through of axle 107S
Construct for OFF.During short circuit, outer bearing part 220 remains closed orientation, until by operation machine
Till structure 106 disconnects.This disconnection can short delay occur in tripping operation.In this replacement constructs, convex
Wheel 230 is positioned at the bottom range of cut out portion 262.In this position, cam 230 can rest against ratchet
In 263, ratchet is used for providing irregular surface, prevents from blowing, unless reached blowing of limited levels
Power.
Referring now to Fig. 3 and 4, in order to illustrate, a part for contact arrangement 101 is shown as closing structure
Make.Fig. 3 illustrates relative distance D1 between moving contact 226M and contact finger pivot 254, contact finger
Relative distance D2 between the installation site of pivot 254 and contact spring 265 and contact finger pivot
Relative distance D3 between 254 and the interior bearing part pivot 224 of interior bearing part 222.Distance D1 can
With between about 25 and about 35mm.Distance D2 may be located between about 20 and about 30mm.
Distance D3 may be located between about 80 and about 100mm.The relative increase of D2/D1 ratio can increase and connects
Touch impact force (blow-on force), and also increase the counteracting force referred at pivot 254.The phase of D3/D1
Contrast ratio may be between about 2.5 and about 3.0.Other distance and ratio can be used.
Fig. 4 illustrates the side view of contact arrangement 101, for clarity sake, removes outer bearing part 220
Foreleg.When in closed structure, it is shown that cam pivot 238 and acting on cam contour 232
Relative distance D5 between the position of force vector F1 and cam pivot 238 and act on cam spring
Relative distance D6 between force vector F2 on installed part 260.Distance D5 may be located at about 10 Hes
Between about 15mm.Distance D6 may be located between about 40 and about 50mm.In some embodiments
In, the ratio of D6/D5 can be greater than about 2:1, greater than about 3:1, or even greater than about 5:1.Obtained
The mechanical gain obtained is represented by equation 1:
F1=(D5/D6) F2 equation 1
In closed structure, connect cam pivot 238 and cam 230 center line 403 be connected
Angular orientation θ between the line 404 at the center of cam pivot 238 and cam spring installed part 260 is permissible
Between about 40 degree and about 50 degree.Other distance, ratio and angular orientation can be used.
Fig. 4 also illustrate that upper detent 263U (going out with dotted lines) alternatively be arranged on bottom spine
The similar mode of pawl 263 is arranged on cam lever 228.This provides the interior bearing part 222 of capture and incites somebody to action
Interior bearing part 222 is maintained at the locking-break function blowing structure.In upper detent 263U also prevents
Bearing part 222 re-closes, until being reset by operating mechanism 106.
As it can be seen in figures 5 and 6, independent contact arrangement 101 can be assembled into multipole contact arrangement 501 (figure
6) neutralize in multipole contact assembly 504 (Fig. 5).In the embodiment shown, independent contact arrangement 101
Can be mutually the same, and it is interpreted as contact arrangement as herein described.Each contact arrangement 101 can construct
And be suitable to receive the single electricity phase provided from polyphase electric power distribution system (not shown).Multipole contact assembly
504 have three-phase.But, each embodiment is equally suitable for together with four phase systems, five-phase system etc. making
With.The phase of other quantity can be used.Each independent contact arrangement 101 can be by support 245 (figure
2H) it is pivotally mounted to Shell of circuit breaker 102 (Fig. 1 and 2 B).The actuating of operating mechanism 106 makes connection
Axle 507S to STATEMENT OF FEDERALLY SPONSORED 107 rotates, and makes the chaining part 507A being fixed to this axle rotate, and this has
Pull up to effect the chaining part 507B of the outer bearing part 220 being as one man connected to each contact arrangement.
When operation, when trip event occurs, such as due to electric current exceedes the specified electricity of described phase
Stream, one or more removable contact fingers 226 rotate.This causes one or more contact finger 226
Quickly rotate, and mobile to blowing structure (Fig. 2 A) from Guan Bi (ON) structure (Fig. 1).Along with contact finger
226 separately, and interior bearing part 222 rotates, and cam lever 228 activates.This causes cam 230 to be taken turns along cam
Wide 232 advance, and mobile from the lower position (the such as position of ratchet 263) (Fig. 1) along cam contour
To the upper position (Fig. 2 A) along profile 232.Cam contour 232 generally includes non-straight shape (example
Such as, arc), and can have the arc radius R of about 50mm to about 55mm, as shown in Figure 2 F.Can
Use other radius value.In one or more embodiments, position is blown when contact arrangement 901 is positioned at
Time, this radius R is accurately centered in common axis 224, as shown in figure 12.
Referring now to Fig. 7 and 8, it is shown that contact arrangement 701, it includes slot type motor 705.Institute
Showing in embodiment, shown three abutment equipment 701 have slot type motor 705, and slot type motor assembles
On the outside side of contact finger 726 side of contact finger assembly, it is positioned at below contact finger 726.For clear
For the sake of, remove outer bearing part and cam lever.Slot type motor 705 can have conventional configurations.
As shown in Fig. 9 and 12, it is shown that the alternative constructions of contact arrangement 901.At contact arrangement 901
In, the cam spring support member 940 of outer bearing part 920 promotes into be respectively at and blows and close (ON)
In structure, shown in such as Figure 10 and 12 and Fig. 9 and 11, cam spring 934 is inclined to be attached to
The outer end of spring support 940 is higher than the inner being attached to cam spring installed part 960.And, multiple
Position spring 965 can be attached between outer bearing part 920 and interior bearing part 922.Back-moving spring 965 is used
In blowing re-close interior bearing part 922 afterwards because of short circuit magnetic force.Figure 11 and 12 also illustrate that along with
Contact finger 926 blows, and cam 930 moves along cam contour 932.
Figure 13 is the flow process illustrating the method operating the electrical contact assembly (such as 104) according to embodiment
Figure.Method 1300 includes: 1302, it is provided that contact arrangement (such as 101), it has outer bearing part
(such as 220)；The interior bearing part (such as 222) that can pivot relative to outer bearing part；And hold interior
The one or more contact fingers (such as 226) that can pivot in holder, one or more contact fingers are the most relative
Spring biased in interior bearing part；Cam lever (such as 228), it is possible to pivot relative to outer bearing part；With
And cam (such as 230) and cam contour (such as 232), it is positioned at corresponding cam lever and bearing part
On, cam contour is suitable to engage with cam；And 1304, in response to trip event, make cam lever
Pivot relative to outer bearing part.Trip event can be contact arrangement trip because of overcurrent situations etc. to
Blow off structure.Another trip event is to rotate outer bearing part and separation by activating operating mechanism 106
Electrical contact (such as 116S, 226M) disconnects contact arrangement (such as 101).
Although the present invention allows various amendment and alternative form, but its specific embodiment and method are to show
Example form is shown in the drawings, and describes in detail in this article.However, it should be understood that be not intended to by
The present invention is limited to disclosed particular device, system or method, and on the contrary, the present invention contains and falls into this
All modifications example, equivalent and alternative in bright spirit and scope.
Claims (20)
1. an electrical contact equipment, including:
Outer bearing part；
Interior bearing part, it is possible to move around interior bearing part pivot relative to described outer bearing part；
One or more contact fingers, are pivotally mounted to described interior bearing part；
Cam lever, is pivotally mounted to described outer bearing part；And
Cam and cam contour, be formed on corresponding cam lever and interior bearing part, and described cam is suitable to
Follow described cam contour.
Making electrical contact with equipment the most as claimed in claim 1, wherein, described interior bearing part includes the first side
With the second side and the contact spring of one or both sides that is attached in described first side and described second side
Support member.
Making electrical contact with equipment the most as claimed in claim 2, wherein, described interior bearing part includes contact finger
Excess of stroke retainer and contact finger blow retainer.
Make electrical contact with equipment the most as claimed in claim 1, wherein, described cam be arranged on described in hold
In holder, described cam contour is arranged on described cam lever.
Making electrical contact with equipment the most as claimed in claim 1, wherein, described cam contour is arranged on groove
In.
Making electrical contact with equipment the most as claimed in claim 5, wherein, described groove includes ratchet.
Making electrical contact with equipment the most as claimed in claim 5, wherein, described groove includes being positioned at groove two ends
Ratchet.
Make electrical contact with equipment the most as claimed in claim 1, including be connected in described cam lever and described outside
Cam spring between bearing part.
Making electrical contact with equipment the most as claimed in claim 1, wherein, described cam includes cam bawl.
Making electrical contact with equipment the most as claimed in claim 1, wherein, described outer bearing part includes a left side
Lower limb, right lower limb and outer bearing part pivot.
11. make electrical contact with equipment as claimed in claim 10, and wherein, described outer bearing part includes cam
Spring support.
12. make electrical contact with equipment as claimed in claim 10, and wherein, described outer bearing part includes and institute
State the cam lever pivot that outer bearing part pivotal interval is opened.
13. make electrical contact with equipment, wherein, described interior bearing part pivot and institute as claimed in claim 10
State outer bearing part pivot and include common axis.
14. make electrical contact with equipment as claimed in claim 1, and wherein, described cam lever includes:
First bar side, the first side of neighbouring described interior bearing part；And
Second bar side, the second side of neighbouring described interior bearing part.
15. make electrical contact with equipment, wherein, described first bar side and described as claimed in claim 14
Two bar side are interconnected by cam spring installed part.
16. make electrical contact with equipment, wherein as claimed in claim 1:
Described outer bearing part has the first lower limb and second lower limb spaced apart with described first lower limb, outer bearing part
Cam lever pivot that pivot is opened with described outer bearing part pivotal interval and cam spring installed part；
Described interior bearing part has the first side and second side spaced apart with described first side, described
Between side and described second side extend contact spring support member and be installed to described first side and
The cam of the every side in described second side, described interior bearing part be suitable to around interior bearing part pivot relative to
Described outer bearing part pivots, and wherein, described interior bearing part pivot and described outer bearing part pivot are coaxial
's；
The one or more contact finger is pivotally mounted to refer to pivot pin, and described finger pivot pin is described
Extend between first side and second side of interior bearing part；
Contact spring, biases each contact finger relative to described contact spring support member；
Described cam lever has the first bar side and the second bar side, and described cam contour is positioned at and is suitable to by institute
Stating on the first cam side of cam joint and each cam side of the second cam side, described cam lever is suitable to
Pivot on described cam lever pivot relative to described outer bearing part；And
Cam spring, is connected between described cam lever and described cam spring installed part.
17. 1 kinds of electrical contact assemblies, including:
Contact arrangement as claimed in claim 1,
The one or more contact finger is adapted to described interior bearing part and rotates, one or many
Individual contact finger is spring biased both with respect to described interior bearing part, and described interior bearing part can be relative to institute
State outer bearing part to pivot；
Described cam lever can pivot relative to described outer bearing part；
Described cam and described cam contour lay respectively on corresponding cam lever and interior bearing part, cam
Profile is suitable to engage with described cam；And
Operating mechanism, is attached to described outer bearing part, and is suitable to disconnect and/or close described contact set
Standby.
18. make electrical contact with assembly as claimed in claim 17, including:
First STATEMENT OF FEDERALLY SPONSORED, is attached to drive the drive shaft of motor；And
Second STATEMENT OF FEDERALLY SPONSORED, is attached to described outer bearing part.
19. 1 kinds of choppers, including:
Shell of circuit breaker；And
Electrical contact assembly, is arranged in described Shell of circuit breaker, and described electrical contact assembly includes:
Contact arrangement as claimed in claim 1,
The one or more contact finger is adapted to described interior bearing part and rotates, one or many
Individual contact finger is spring biased both with respect to described interior bearing part, and described interior bearing part can be relative to institute
State outer bearing part to pivot；
Described cam lever can pivot relative to described outer bearing part；
Described cam and described cam contour, lay respectively on corresponding cam lever and interior bearing part, convex
Wheel profile is suitable to engage with described cam；And
Operating mechanism, is attached to described outer bearing part, and is suitable to disconnect and/or close described contact set
Standby.
20. 1 kinds of methods operating electrical contact equipment, including:
Thering is provided contact arrangement, described contact arrangement has: outer bearing part；Interior bearing part, it is possible to relatively
Pivot in described outer bearing part；One or more contact fingers, it is possible to pivot on interior bearing part, one
Or multiple contact finger is spring biased both with respect to interior bearing part；Cam lever, it is possible to outside described
Bearing part pivots；And cam and cam contour, it is positioned on corresponding cam lever and bearing part, institute
State cam contour to be suitable to engage with cam；And
Described cam lever is made to pivot relative to described outer bearing part in response to trip event.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/US2012/024437 WO2013119232A1 (en) | 2012-02-09 | 2012-02-09 | Electrical contact apparatus, circuit breakers, and electrical contact assemblies including cam lever, and methods of operation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104115249A CN104115249A (en) | 2014-10-22 |
| CN104115249B true CN104115249B (en) | 2016-11-09 |
Family
ID=45768304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201280069109.XA Expired - Fee Related CN104115249B (en) | 2012-02-09 | 2012-02-09 | Electrical contact equipment, chopper and electrical contact assembly and operational approach including cam lever |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US9281144B2 (en) |
| EP (1) | EP2812903A1 (en) |
| CN (1) | CN104115249B (en) |
| WO (1) | WO2013119232A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9530592B1 (en) | 2015-09-16 | 2016-12-27 | Siemens Aktiengesellschaft | Arc extinguishing assemblies and methods |
| US9704676B1 (en) * | 2016-03-15 | 2017-07-11 | Siemens Aktiengesellschaft | Slot motor assembly and arc plate assembly combination |
| US9805887B2 (en) * | 2016-03-16 | 2017-10-31 | Siemens Aktiengesellschaft | Slot motor configuration for high amperage multi-finger circuit breaker |
| US10497528B2 (en) | 2017-06-01 | 2019-12-03 | Siemens Aktiengesellschaft | Multi-finger electrical contact assemblies , circuit breakers, and methods having increased current withstand capabilities |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4645891A (en) * | 1985-07-18 | 1987-02-24 | Westinghouse Electric Corp. | Molded case circuit breaker with a movable electrical contact positioned by a spring loaded ball |
| US5341191A (en) * | 1991-10-18 | 1994-08-23 | Eaton Corporation | Molded case current limiting circuit breaker |
| EP0717174A1 (en) | 1994-12-12 | 1996-06-19 | Isuzu Motors Limited | Valve operating system for internal combustion engine |
| US5793270A (en) * | 1996-09-03 | 1998-08-11 | Eaton Corporation | Circuit breaker with latch preventing rebound of blow open contact arm |
| US6977568B1 (en) * | 2005-01-13 | 2005-12-20 | Eaton Corporation | Blow open moving contact assembly for electric power switching apparatus with a very high current interruption rating |
| US7646269B2 (en) * | 2007-03-07 | 2010-01-12 | Eaton Corporation | Electrical switching apparatus, and conductor assembly and shunt assembly therefor |
-
2012
- 2012-02-09 EP EP12706152.1A patent/EP2812903A1/en not_active Withdrawn
- 2012-02-09 US US14/368,077 patent/US9281144B2/en not_active Expired - Fee Related
- 2012-02-09 CN CN201280069109.XA patent/CN104115249B/en not_active Expired - Fee Related
- 2012-02-09 WO PCT/US2012/024437 patent/WO2013119232A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| EP2812903A1 (en) | 2014-12-17 |
| WO2013119232A1 (en) | 2013-08-15 |
| US20150041436A1 (en) | 2015-02-12 |
| US9281144B2 (en) | 2016-03-08 |
| CN104115249A (en) | 2014-10-22 |
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| SE01 | Entry into force of request for substantive examination | ||
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Granted publication date: 20161109 Termination date: 20200209 |